elfborg



H. G. ELFBORG.

Patehted June 10,

1919. 2 SHEETS-SHEET 1.

H. G. ELFBORG. N U T L 0 C K.

APPLICATION LED AUG.2I. 1917- 1,306,41 8. Patented June '10, 1919.

' 2 EEEEEEEEEEEE 2- mmirmm'imrii I x W gig HENRY- G. ELFBORG, OFCHICAGO, ILLINOIS.

NUT-LOCK.

Specification of Letters Patent.

Patented June 10, 1919.

Application filed August 21, 1917. Serial N 0. 187,399.

To all whom it may concern: 7

Be it known that I, HENRY G. ELFBORG, a citizen of the United States,residing at Chicago,,in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Nut-Locks, of which thefollowing is a specification.

This invention relates to a nut lock, and its purpose is to provide animproved device for preventing the accidental removal of a nut from thebolt with which it is used. In this highly developed art most lookingdevices are embodied in or adapted to be used with modified forms ofnuts, so that the locking device cannot be manufactured as a separateand independent commodity to be used with standard nuts, but the nutsthemselves must be specially constructed at great expense. It is theprincipal Ob ect of the present invention to provide an efficientlocking device for use with any of the standard forms of nuts. A furtherobject is to provide a modified form of washer having parts adapted tocoact with a standard nut in order to lock'it in position on a bolt.Another feature is the provision of a device having parts to engage astandard nut externally, and having an aperture which is eccentricallylocated with respect to the threaded aperture of the nut, so that a.

frictional grip and binding action are produced when a locking deviceand nut are applied to the bolt, thus preventing loosening of the nutdue to vibration or abrasion. An important advantage of the presentinvention is that it exerts an efficient locking action in all positionsof the nut on'the bolt, so that the nut may be tightened or loosened atany time without decreasing the locking effect of the device.

Other objects and advantages will appear more fully from the followingspecificat on, taken in connection with the accompanying drawings, inwhich several embodiments of the invention are illustrated. v

In the drawings r t Figure 1 shows a perspective view of a bolt and nutsecuring certain members together, my improved locking device beingemployed therewith. p V

Fig. 2 shows a side elevation of the nut and locking device shown inFig. 1.

Fig. 3 shows a side elevation of the nut and locking washer before thecorners of the latterhave been turned upward to engage the sides of thenut.

Fig. 4 shows a sectional view of a modified form of the deviceillustrated in Figs. 1, 2, and 3.

Fig. 5 shows a sectional view through the device illustrated in Fig. 4,taken on the line 4-4.

Fig. 6 shows a sectional view, taken .on the line 66 of Fig. 4.

Fig. 7 shows another form of my invent lOIl used in connection with anut and'bolt for securing two members together.

Fig. 8 shows a side elevation of the locking device illustrated in Fig.7 with the nut seated thereon.

Fig. 9 shows a view of the locking washer illustrated in Fig. 8 with thenut removed.

Fig. 10 shows a planview of another form of my invention.

Fig. 11 shows a sectional View, taken on the line 11-11 of Fig. 10; and

Fig. 12 shows a planview of the locking washer shown in Fig. 10, withthe nut and wear plate removed.

Although this improved locking device is adapted to be used with nuts inany position or location where it may be desired to prevent theaccidental removal of a nut from a 1 bolt, I have for the purposes ofillustration shownthe invention in Fig. 1 as employed in connection witha bolt 15 and a standard nut 16 for securing the fish plates 17 to arailway rail 18. .The bolt is threaded, as shown at 15, in the usualway, being provided at one end with a head 15", and being engaged on thethreaded portion by the nut 16, which in the embodiment illustrated is asquare nut, although the invention is capable washer they are turnedupwardly, as shown in Fig. 2, to engage the lateral faces of the nut, sothat as the nut is turned on the bolt the washer will turn with it. Thisplate 20 is provided with a threaded aperture 21, which is eccentricallylocated with respect to the threaded aperture 16 of the nut when thebolt the offset relation of the threaded V aperture will cause thewasher to force the nut into binding engagement with the bolt and firmlyholdthe nut against accidental movement on the bolt. Although the nutmay be moved by means of a wrench or the like, the movement of the nutby the direct engagement of the fingers or the accidental removal of thenut from the bolt are effectually prevented. It will be understood thatin the application of this form of my invention, the nut and washer arefirst placed in assembled relation before being applied to the bolt.

Figs. 4,5, and 6 illustrate a modified form of the device shown in Figs.1,2, and 3. In j this modified form a, substantlally square plate 25 isemployed, but instead of being turned'in an annular relation withrespect to the lateral sides of the nut, as in the preceding embodimentof the invention, this 1 plate is provided with flanges 26 on itslateral sides, which are turned upwardly, as shown in Figs. 5 and 6,forming a rectangular recess adapted to receive the nut; The plate isprovided with a threaded aperture 27, which is eccentric-ally located,that is,

it is displaced from the central point of the plate, so that in theapplication of the device to a bolt a locking pressure is produced.In'the application of. this form'of the invention to a bolt,. the washeris first placed. assembled relation with respect. to

a nut, and that-we members are then appliedito the bolt by means of awrench.

In Figs. 7, 8, and 9, I have illustrated still another form of theinvention. For convenience in illustrating this form I have shown abolt3 0 engaged by a. standard nut 31 for holding together two members 32and. 3.3. The locking device is embodied in a washer 3 l, of circular orother suitable form, having a centrally located threaded sperm-6.35adapted to engage the threaded part i the bolt 30'. In this form. of theinvention the locking efiect is p'roduced by meansof a curved shoulder36, which projects fromthe face of'thewasher with "its inner'surfa'ce 36located so thatits center 37 isdisplaced from the center of the washerand the center of. the apertiire After, placing the nut and washertogether and applying them to the bolt, it will'be. seen. that, thecorners of the nut 31 will ride on the surface 36", as illustratedinFig. 6, sothat the washer will he forced in a direction transverse tothe axis, of the bolt, and thus set up anqefte'c'tive locking actionwhich will prevent accidental removal of the nut, the

nut bein forced in a direction transversely the Washer is forced. Thisform of the, in-

vention requires but a slight modification of the usual washer, and maybe constructed with very slight expense.

The form of the invention illustrated in F igs; 10, 11, and 12 has beenillustrated in connection with a bolt 40 and standard nut 41. Thelocking device. comprises'a cup shaped washer 42, having a threadedaperture 43 eccentrically located with respect to the periphery of thewasher and the inner circular surface 42* thereof. In order to preventundue wear upon the annular surface 42 of this washer, I prefer toemploy in connection with this form of the invention a wearplatetl,which is in the form. of a; sheet metal plate inderlying the nut 41 andhaving transversely extending bow-shaped lugs 4-1 which; engage thesides ofthenut, so that the plate will rotate therewith. The roundedsurfaces of the lugs are adapted to ride upon the inner downwardlycoirverging wall 42 of the avasherQ, and because of the eccentriclocation of the threaded aperture in the washer, the application of thenut to the bolt will result invforcing the nut transversely to the axisof the bolt, thereby setting up a pressure on the bolt which will;effectually prevent accidental removal of'the nut. In this form of theinven- 7 tion the washer ispreferably applied to the bolt before the nutis placedthereon. In each form of the invention the aperture throughthe; locking washer is preferably threaded to reduce the wear on thethreads of-the bolt. 7 V I v I Although severalembodiments of the Iventionhave been illustrated for purposes of explaining the principle ofinvestmentwill be; understood that mygimpmvement may be embodied instill other I forms with? out departing from thel spirit ofthe-invention asdefined inthe appended claims.

1," In combination, a bolt, a standard nut threadedly engaging saidbolt, and athreaded washerhaving a part engaging, said nut to set up;'a. binding frictional grip trans- V versely of said, bolt between said.nut said bolt. i

2., In combination, a bolt, anut threadedly engaging said bolt, andyaflooking washer;

seating against, the end face and the outer sides of said nut andha'vingan. eccentrically located aperture to b elosely fitted by said bolt. e VI 8.;A lockingdevice comprisinga metal plate having parts adapted toengagethe lateraLsides of a nut and having an ween-" trically locatedaperture adapted to bedisplaced from thelaperture; ofthenut when thenut'and washer are in, assembled relation, the aperture in said platebeing of; the" samesi'ze as the apertureiinsaid nut.

4;. In combination, a bolt, a standard nut threadedly engaging saidbolt, a plate seating against said nut and having parts engaging the nutto prevent relative angular movement of said nut and plate, said platehaving a threaded aperture therethrough displaced from the threadedaperture of said nut When said nut and plate are in assembled relation.

5. In combination, a bolt, a standard nut threadedly engaging said bolt,and a plate having a part to engage a lateral surface of said nut, saidplate being further provided with a threaded aperture adapted to engagesaid bolt, said aperture and said part of said plate being disposed toeffect a transverse lginding action of said plate and nut on said 6. Incombination, a bolt, a standard nut threadedly engaging said bolt, and alooking Washer threadedly engaging said bolt and having parts engagingthe lateral sides of said nut to prevent relative transverse and angularmovements of said Washer and nut, the aperture in said Washer beingeccentrically located With respect to the aperture in said nut.

7. In combination, a bolt, a standard nut threadedly engaging said bolt,and a locking Washer threadedly engaging said bolt and havingnon-resilient flanges engaging opposite lateral faces-of said nut toprevent relative angular and transverse movements of said Washer andnut, the aperture of said Washer being eccentrically located withrespect to the aperture of said nut.

8. In combination, a bolt, a standard nut threadedly engaging said bolt,and a locking Washer having parts adapted to engage the lateral sides ofsaid nut and having an eccentrically located aperture therethrough, theWalls of said aperture in said Washer being arranged to engage oppositesides of the threaded portion of said bolt When said Washer and said nutare assembled thereon.

In testimony Whereof, I have subscribed my name.

HENRY G. ELFBORG.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

